I had one with my 1st pregnancy and was thankful for the antibiotics. The pain was excruciating and I couldn't walk. You and baby should be fine!
I have had repetitive UTI'S since i was 13. Im now 14 weeks pregnant and 24 years old and still get them (i get them more frequent now). My baby is fine. I dont take antibiotics because i can have just 1 in the morning and it will be gone by midday. I just try to prevent them and if I get them I treat the symptoms. I would take antibiotics though if i was in your situation.
I told my Dr I was worried I may have some kind of infection she said it cud be nothin to worry about tht it cud be a uti acted like it wasn't a big deal if it was I think it'll be fine sweetie don't stress